Stovepipe-elbow



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STOVEPIPE ELBOW. No. 521,621. I Patented June 19, 1894.

BS Q E flweo )VZW UNITED STATES PATENT OFFICE.

OHARLES LINDEMANN AND AUGUST LINDEMANN, OF MILWAUKEE,

WISCONSIN.

STOVEPlPE-ELBOW.

SPECIFICATION forming part of Letters Patent No. 521,621, dated June 19, 1894.

Application filed J'mie15,1891. smart. 396,224. (No model.)

To all whom it may concern.-

Be it known that we, CHARLES LINDEMANN and Aueosr LINDEMANN, citizens of the Unlted States, and residents of Milwaukee, in the county of Milwaukee, and in the State of Wisconsin, have invented certain new and useful Improvements in Stovepipe-Elbows; and we do hereby declare that the following 1s a full, clear, and exact description thereof.

Heretofore attempts have been made by manufacturers of stove-pipe elbows to construct the latter in sections ready to be joined and locked together, said sections being nested together, as a matter of economy in storage and transportation, but for the reasons hereinafter given such stove-pipe elbows have not become a merchantable article. OW- lng to variations in the nature of the material from which elbow sections are made, a small fraction of an inch deviation will oftentimes cause a considerable difference in the matter of oming two or more of such sections to complete an elbow, and as dealers and consumers are not supplied with tools and appliances common in a factory for the manufacture of such devices they frequently find great difficulty in finishing the same accurately and correctly, and it is impossible for them to maintain a correct standard fit for both ends of an elbowto correspond to the pipe or pipes to which it is to be joined.

To as far as possible overcome the difficulties heretofore experienced without detractmg from the advantages gained by nesting the partially completed elbows is the object of our invention, the latter consisting in the peculiar construction and combination of parts to be hereinafter described with reference to the accompanying drawings and subsequently claimed.

In the drawings:-Figure 1 represents a front elevation of a partly finished two sectlon stove-pipe elbow constructed according to our invention; Fig. 2, a side elevation of the same, and Fig. 3, a front elevation of a three-section elbow. I

Referring by letter to the drawings,A represents the sections that unite to form a stove pipe elbow, the number of these sections being two or more, as may be found most desirable, and as a matter of preference said sections are of such relative proportions that they may be struck up from blanks of two patterns, that is to say, if the elbow be composed of two sections, there is a set of dies for each one, the seam folds being formed by the same operation that curves the section, but in case of a three section elbow one set of dies will answer for shaping two of said sections and another set of dies for the third. The seam folds b at the longitudinal edges of the elbow sections may be of any suitable form,'the one shown being very generally employed, and it is preferable in a two section elbow to have the seams intermediate of the throat and back, while in a three section elbow shown in the drawings, one seam is at the throat and the others along the sides.

All of the seams, save one are secured in the factory, the latter seam being secured by the dealer or consumer, and herein we consider that we have made a very considerable improvement, as from the nature of the material composing the elbowit is difficult for inexperienced persons working with ordinary tools to make a good job of putting together an elbow in which all the seam-folds have to be interlocked and fastened, as in the ordinary construction of partially completed elbows.

By having all of the elbow-seams, excepting one, closed and secured, there is enough yield in the material to permit nesting several partially completed elbows together, as a matter of economy in storage or transportation, and from the fact that some part of the seaming has been completed at the factory, a great'deal of time and labor is saved the dealer in the matter of finishing an elbow, this of itself being an advantage, while at the same time this finished elbow is not only of standard diameter at both ends to insure accurate fitting to the other pipe butit is 0therwise better than one wherein all the seams are completed by the dealer.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. As an improved article of manufacture, a partly finished curved stove pipe elbow madefrom sections seamed together, in the direction of the length of the elbow when completed, and having meeting edges disunited, but in condition to be interlocked and secured without departure of the completed elbow from a standard diameter at its ends, substantially as set forth.

2. As an improved article of manufacture, a partly finished curved stove-pipe elbow made from a series of sections, more than two, seamed one to another in the direction of the length of the elbow, when completed, and meeting edges of two of said sections disunited, but in condition to be interlocked and secured without departure of the completed elbow from a standard diameter at its ends, substantially as set forth.

3. As an improved article of manufacture, a curved stove-pipe elbow comprising three sections having their greatest length longitudinally of the elbow and seamed together at their meeting edges, substantially as set forth.

In testimony that we claim the foregoing we have hereunto set our hands, at Milwaukee, in the county of Milwaukee and State of Wisconsin, in the presence of two witnesses.

CHARLES LINDEMANN. AUGUST LINDEMANN. Witnesses:

N. E. OLIPHANT, WM. KLUG. 

